FBConnect = {

  init : function(api_key, plugin_path,
                  template_bundle_id, home_url,
                  wp_user, app_config) {

    if (!api_key) {
        FBConnect.error("api_key is not set");
    }

    if (!plugin_path) {
        FBConnect.error("plugin path not provided");
    }

    FBConnect.home_url = home_url || "/";

    FBConnect.plugin_path = plugin_path;
    FBConnect.template_bundle_id = template_bundle_id;
    FBConnect.wp_user = wp_user;

    FB.init(api_key, plugin_path + "xd_receiver.php", app_config);
  },

  appconfig_reload : {
    reloadIfSessionStateChanged: true
  },

  appconfig_none : {},

  appconfig_ajaxy : {
    ifUserConnected : fbc_onlogin_noauto,
    ifUserNotConnected : fbc_onlogout_noauto
  },

  logout : function() {
    FB.ensureInit(function() {
       FB.Connect.logout();
    });
  },

  

  redirect_home : function() {
    window.location = FBConnect.home_url;
  },

  /*
   wordpress specific functions
   */
  setup_feedform : function() {

    if (!FBConnect.template_bundle_id) {
      FBConnect.error("no template id provided");
      return;
    }
  },

  show_comment_feedform : function(callback) {

    var template_data = {
        'post-url': window.location.href,
        'post-title': FBConnect.article_title,
        'blog-name': FBConnect.blog_name,
        'blog-url': FBConnect.home_url
    };

    var comment_text = '';
    var comment = ge('comment');
    if (comment) {
      comment_text = comment.value;
    }

    if (jQuery.trim(comment_text).length === 0) {
      return false;
    }

    var body_general = FBConnect.make_body_general(comment_text);

    FB.Connect.showFeedDialog(FBConnect.template_bundle_id,
                              template_data,
                              null, // template_ids
                              body_general,
                              null, // story_size
                              FB.RequireConnect.promptConnect, // require_connect
                              callback);
    return false;

  },

  /*
   * Generates FBML for the body of a newsfeed story.  The story looks like:
   *
   * Sally wrote: "some insightful comment"
   */
  make_body_general : function(comment) {
    var words = comment.split(' ');
    if (words.length > 50) {
      words = words.slice(0, 50);
      words.push('...');
    }
    var comment_clip = words.join(' ');
    return "<fb:pronoun capitalize=\'true\' useyou=\'false\' uid=\'actor\' /> wrote: \"" + comment_clip + "\"";
  },

  error : function() {
    FB.FBDebug.writeLine.call(arguments);
  },

  log : function() {
    FB.FBDebug.writeLine.call(arguments);
  }
};

// end FBConnect

function fbc_onlogout_noauto() {
  fbc_set_visibility_by_class('fbc_hide_on_login', '');
  fbc_set_visibility_by_class('fbc_hide_on_logout', 'none');
  // TODO: feedform disable
}


function fbc_onlogin_noauto() {

  fbc_set_visibility_by_class('fbc_hide_on_login', 'none');
  fbc_set_visibility_by_class('fbc_hide_on_logout', '');

//   fbc_remove(ge('fbc_login'));

//   var userlink = ge('fbc_userlink');
//   if (userlink) {
//     userlink.setAttribute('uid', FB.Facebook.apiClient.get_session().uid);
//     userlink.setAttribute('usenetwork', 'false');
//     FB.XFBML.Host.addElement(new FB.XFBML.UserLink(userlink));
//   } // if false, probably already happened

//   ge('fbc_logged_in').style.visibility = '';

  fbconnect.setup_feedform();
}

function fbc_set_visibility_by_class(cls, vis) {
  var res = document.getElementsByClassName(cls);
  for(var i = 0; i < res.length; ++i) {
    res[i].style.visibility = vis;
  }
}


function ge(elem) {
  return document.getElementById(elem);
}